If you are just making a Halloween costume for trick-or-treating, then I would advise saving money and tailoring the costume on your own. An Ash Ketchum costume involves some simple, colorful clothes and a hat. He treats Pokémon not just as battle pets, cosplay mens costumes but also as best friends. You might accessorize it with a Poké Ball. The cosplayer still wears black gloves without spikes and a hairstyle similar to that of the character; she also wears glasses.